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Quantitative histology as a diagnostic tool for celiac disease in children and adolescents
Mateus M Vargas1, Ricardo Artigiani Neto2, Vera L Sdepanian3
1Pediatric and Pediatric Surgery Department, State University of Londrina, Londrina, Paraná, Brazil.
Insights
Quantitative histology accurately diagnoses pediatric celiac disease. Counting intraepithelial lymphocytes (≥25/100 enterocytes) and assessing villous height are key diagnostic markers, with the Q-histology scale proving superior to Q-Marsh.
Area of Science:
- Pediatric Gastroenterology
- Histopathology
- Immunology
Background:
- Celiac disease diagnosis in children relies on small intestinal biopsy analysis.
- Histological assessment traditionally uses villous height, crypt depth, and intraepithelial lymphocyte (IEL) counts.
- Standardized quantitative methods are needed for accurate diagnosis and classification.
Purpose of the Study:
- To quantitatively measure villous height, crypt depth, and IELs in pediatric celiac disease.
- To classify histological findings using the Q-Marsh and Q-histology scales.
- To evaluate the diagnostic utility of quantitative histology in differentiating celiac disease from other conditions.
Main Methods:
- Retrospective analysis of duodenal biopsies from pediatric patients.
- Groups included: celiac disease (n=50), controls (n=26), and giardiasis (n=10).
- Villous height, crypt depth, and IEL counts were quantified using image analysis software (cellSens, Image J).
Main Results:
- Celiac disease patients exhibited significantly lower mean villous height (197.83 μm) compared to controls (477.70 μm) and giardiasis (397.04 μm).
- The villous:crypt ratio was markedly reduced in celiac disease (0.78) versus controls (1.89).
- Intraepithelial lymphocytes ≥25/100 enterocytes demonstrated 100% sensitivity and specificity for celiac disease, distinguishing it from controls and giardiasis.
Conclusions:
- Quantitative assessment of villous height and IEL counts are crucial for diagnosing pediatric celiac disease.
- An IEL count of ≥25/100 enterocytes is a highly specific marker for celiac disease.
- The Q-histology scale is a valuable and potentially more suitable tool than the Q-Marsh scale for precise histological classification of celiac disease.
Objective:
To measure the villous height, the crypt depth, and the number of intraepithelial lymphocytes/100 enterocytes of the small intestinal mucosa of children and adolescents with celiac disease; and to classify these findings according to Q- Marsh and Q-histology scales.
Methods:
Retrospective study of a database from the Department of Pathology of biopsies from the second portion of the duodenum of pediatric patients. According to the histological report, three groups were established: celiac disease at diagnosis (n = 50), controls (n = 26), giardiasis (n = 10). In each biopsy, software (cellSens and Image J) evaluated 5 villous heights, 5 crypt depth and the number of intraepithelial lymphocytes/100 enterocytes.
Results:
The celiac group had the lowest mean villous height (197.83 μm) of all three groups (control = 477.70 μm; giardiasis = 397.04 μm. The celiac group's villous:crypt ratio (0.78) was significantly lower than the control group (1.89). The number of intraepithelial lymphocytes ≥25 was exclusive to the celiac group, with a sensitivity and specificity of 100 %. Only celiac patients were included in types 2 and 3 of the Q-histology classification.
Conclusion:
Celiac disease patients showed shorter villous height than other groups, and the number of intraepithelial lymphocytes ≥25 was the best parameter to differentiate celiac from controls and giardiasis groups. Intraepithelial lymphocytes ≥25/100 enterocytes associated with any degree of villous atrophy, the classic Marsh 3 type, set the histological parameters of celiac disease. Quantitative histology is a valuable tool for diagnosing celiac disease, enabling histological changes in a short time, and the Q-histology scale appears to be more suitable than the Q-Marsh scale.
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